Effect of nonmetal element dopants on photo- and electro-chemistry performance of ultrathin g-C3N4 nanosheets
Effect of nonmetal element dopants on photo- and electro-chemistry performance of ultrathin g-C3N4 nanosheets
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非金属元素掺杂剂对超薄g-C3N4纳米片光电化学性能的影响
DOI：
10.1016/j.ijhydene.2020.04.110
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发表时间：
2020-06
影响因子：
7.2
通讯作者：
Yang Ping
中科院分区：
文献类型：
--
作者：
Wang Yaya;Cao Yongqiang;Liu Yingjie;Yang Ping
增加电荷转移和光吸收以及大的比表面积是提高光催化剂催化效率的有效途径。本文将巴比妥酸、尿素和硫脲分别冷冻干燥，与三聚氰胺形成均相前驱体，然后在750°C下热聚合，成功地对g-C3N4进行C、N和S掺杂。其中，C掺杂的g-C3N4表现出良好的光催化产氢性能，达到2.45 mmol g−1h−1。 N 掺杂的 g-C3N4 对有机染料 (RhB) 表现出增强的光催化降解性能，在 8 分钟内完全降解，而 S 掺杂样品的性能则不令人满意。 C的引入导致平坦化的样品具有更大的比表面积并提供更多的活性位点。 N掺杂使价带位置向高能方向移动。因此，空穴具有更强的氧化能力。因此，充分讨论了C和N比例对g-C3N4光催化的影响，以更全面地了解g-C3N4。
Increased charge transfer and light absorption as well as large specific surface area are effective ways to improve the catalytic efficiency of photocatalysts. In this paper, barbituric acid, urea and thiourea were separately freeze-dried to form a homogeneous precursor with melamine, followed by thermal polymerization at 750 °C, g-C3N4was doped successfully with C, N and S. Among them, C-doped g-C3N4revealed well photocatalytic hydrogen production which reached to 2.45 mmol g−1h−1. N-doped g-C3N4exhibited enhanced photocatalytic degradation properties for organic dye (RhB) which is completely degraded within 8 min while the performance S-doped sample is not satisfied. The introduction of C resulted in planarized sample which has a larger specific surface area and provides more active sites. N doping makes the valence band position moving in the direction of high energy. Thus, holes have stronger oxidizing ability. Accordingly, the effect of C and N ratios in g-C3N4photocatalysis was fully discussed for more comprehensive understanding of g-C3N4.
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影响因子：
4.9
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通讯作者：
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